Amazon Linux AMI : perl-YAML-LibYAML (ALAS-2015-482)

2015-02-13T00:00:00
ID ALA_ALAS-2015-482.NASL
Type nessus
Reporter Tenable
Modified 2015-02-13T00:00:00

Description

An assertion failure was found in the way the libyaml library parsed wrapped strings. An attacker able to load specially crafted YAML input into an application using libyaml could cause the application to crash.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2015-482.
#

include("compat.inc");

if (description)
{
  script_id(81328);
  script_version("$Revision: 1.1 $");
  script_cvs_date("$Date: 2015/02/13 14:50:40 $");

  script_cve_id("CVE-2014-9130");
  script_xref(name:"ALAS", value:"2015-482");

  script_name(english:"Amazon Linux AMI : perl-YAML-LibYAML (ALAS-2015-482)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Amazon Linux AMI host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An assertion failure was found in the way the libyaml library parsed
wrapped strings. An attacker able to load specially crafted YAML input
into an application using libyaml could cause the application to
crash."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/ALAS-2015-482.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Run 'yum update perl-YAML-LibYAML' to update your system."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perl-YAML-LibYAML");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perl-YAML-LibYAML-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2015/02/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/02/13");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015 Tenable Network Security, Inc.");
  script_family(english:"Amazon Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/AmazonLinux/release")) audit(AUDIT_OS_NOT, "Amazon Linux AMI");
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (rpm_check(release:"ALA", reference:"perl-YAML-LibYAML-0.59-1.16.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"perl-YAML-LibYAML-debuginfo-0.59-1.16.amzn1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "perl-YAML-LibYAML / perl-YAML-LibYAML-debuginfo");
}